Full crash of Julia

[PaulDebus]

Hello,

so I found a hard crash of Julia from a small piece of code

using Random
a = reshape(shuffle(0:15), 4, 4)
b = reshape(transpose(a), 1, :)
circshift(b, -1))

And the resulting crash "report" is:

Illegal inttoptr
	  %uglygep88 = ptrtoint i8 addrspace(13)* %uglygep to i64
Illegal inttoptr
	  %scevgep8990 = ptrtoint i64 addrspace(13)* %scevgep89 to i64
Illegal inttoptr
	  %215 = inttoptr i64 %214 to i8 addrspace(13)*
Illegal inttoptr
	  %umax9192 = inttoptr i64 %umax91 to i64 addrspace(13)*

signal (6): Aborted
in expression starting at /home/paul/test.jl:4
gsignal at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x7f98b857fd04)
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
unknown function (ip: 0x7f98b8669ac1)
unknown function (ip: 0x7f98b866c2d8)
unknown function (ip: 0x7f98b866c8cd)
unknown function (ip: 0x7f98b85a7b4a)
unknown function (ip: 0x7f98b85d9082)
unknown function (ip: 0x7f98b85fe84b)
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
unknown function (ip: 0x7f98b861175b)
unknown function (ip: 0x7f98b8611389)
unknown function (ip: 0x7f98b86118f0)
unknown function (ip: 0x7f98b86129c8)
unknown function (ip: 0x7f98b8613616)
unknown function (ip: 0x7f98b862be08)
unknown function (ip: 0x7f98b8607105)
jl_load at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
include at ./Base.jl:377
exec_options at ./client.jl:288
_start at ./client.jl:484
jfptr__start_2075.clone_1 at /usr/lib/x86_64-linux-gnu/julia/sys.so (unknown line)
unknown function (ip: 0x5585861d29d9)
unknown function (ip: 0x5585861d25a6)
__libc_start_main at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x5585861d264d)
Allocations: 2505 (Pool: 2493; Big: 12); GC: 0
Aborted (core dumped)

versioninfo is:

Julia Version 1.4.1
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)

Please let me know if I can help in any way!

[masuday]

I can't reproduce it in 1.4.0 (Linux), 1.4.1 (Windows) and 1.5.0 (Windows & Linux).

[affans]

Also can not reproduce on 1.4.0

julia> versioninfo()
Julia Version 1.4.0
Commit b8e9a9ecc6 (2020-03-21 16:36 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, broadwell)

You do have an extra closing parenthesis in circshift(b, -1)) is this just a typo?

You may also try to use the julia rr tool

[PaulDebus]

Also can not reproduce on 1.4.0

julia> versioninfo()
Julia Version 1.4.0
Commit b8e9a9ecc6 (2020-03-21 16:36 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, broadwell)

Hm... I checked on a different machine with the same Linux install but different hardware and I could reproduce it.

You do have an extra closing parenthesis in circshift(b, -1)) is this just a typo?

Yep, that's a typo

You may also try to use the julia rr tool

Yes, I am going to try that. Only need to install Julia 1.5

[PaulDebus]

So I tried with a fresh 1.5 installation and cannot reproduce the problem either. So I cannot use the rr tool. If nobody else can reproduce that, I maybe have to talk to the package maintainer of Ubuntu/Pop OS

[thofma]

Are these the official julia binaries. If not, can you reproduce with the official binary from https://julialang.org/downloads/oldreleases/?

[PaulDebus]

They are installed via the package manager. It should be this package: https://packages.ubuntu.com/focal/julia

[KristofferC]

Report it to the distribution then. The official way to use Julia is by using the binaries at https://julialang.org/downloads/

[mbauman]

Specifically, this is happening because they're using a shared system LLVM. Julia uses LLVM very heavily and requires carrying forward patches for nearly every LLVM release:

https://github.com/JuliaLang/julia/tree/release-1.4/deps/patches

Without these patches, Julia will fail tests and generally be buggy.

[PaulDebus]

Specifically, this is happening because they're using a shared system LLVM. Julia uses LLVM very heavily and requires carrying forward patches for nearly every LLVM release:

https://github.com/JuliaLang/julia/tree/release-1.4/deps/patches

Without these patches, Julia will fail tests and generally be buggy.

Good to know, thank you! And sorry for the noise

[StefanKarpinski]

No problem. But please do report it to Ubuntu! The distros are very reluctant to allow Julia to use its own LLVM, which leads to almost every distro version of Julia being broken. The more people make noise to them about this, the more likely they are to actually do something about it and build Julia with its own patched LLVM.